diff --git a/lib/js_locale_helper.rb b/lib/js_locale_helper.rb
index 8b396707e1f..bcdc56b4e5c 100644
--- a/lib/js_locale_helper.rb
+++ b/lib/js_locale_helper.rb
@@ -163,7 +163,17 @@ module JsLocaleHelper
       require("discourse-mf");
     JS
   rescue => e
-    Rails.logger.error("Failed to compile message formats for #{locale} '#{e}'")
+    message_formats[locale.to_s]
+      .filter_map do |key, value|
+        next if MessageFormat.compile(locale, value, strict: false)
+      rescue StandardError
+        key
+      end
+      .then do |strings|
+        Rails.logger.error(
+          "Failed to compile message formats for #{locale}.\n\nBroken strings are: #{strings.join(", ")}\n\nError: #{e}",
+        )
+      end
     <<~JS
       console.error("Failed to compile message formats for #{locale}. Some translation strings will be missing.");
     JS
diff --git a/spec/lib/js_locale_helper_spec.rb b/spec/lib/js_locale_helper_spec.rb
index 7ba797febc9..c0a92275c9a 100644
--- a/spec/lib/js_locale_helper_spec.rb
+++ b/spec/lib/js_locale_helper_spec.rb
@@ -169,8 +169,10 @@ RSpec.describe JsLocaleHelper do
     let(:translated_message) do
       v8_ctx.eval("I18n._mfMessages.get('posts_likes_MF', {count: 3, ratio: 'med'})")
     end
+    let(:fake_logger) { FakeLogger.new }
 
     before do
+      Rails.logger.broadcast_to(fake_logger)
       overriden_translation_ja.update_columns(
         value: "{ count, plural, one {返信 # 件、} other {返信 # 件、} }",
       )
@@ -178,6 +180,8 @@ RSpec.describe JsLocaleHelper do
       v8_ctx.eval(output)
     end
 
+    after { Rails.logger.stop_broadcasting_to(fake_logger) }
+
     context "when locale is 'en'" do
       let(:locale) { "en" }
 
@@ -258,6 +262,11 @@ RSpec.describe JsLocaleHelper do
       it "raises an error" do
         expect(output).to match(/Failed to compile message formats/)
       end
+
+      it "logs which keys are problematic" do
+        output
+        expect(fake_logger.errors).to include(/posts_likes_MF/)
+      end
     end
   end